package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对客户端提交的明文密码，使用md5进行转换
        String md5Pwd = DigestUtils.md5Hex(password);
        //  拿md5转换的结果，和数据库里的结果对比：如果不同，说明密码错误
        if (!md5Pwd.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public Result addEmployee(EmployeeDTO dto) {
        //封装实体类对象
        Employee employee = new Employee();
        //使用工具类BeanUtils把dto里的数据，拷贝到employee对象里
        BeanUtils.copyProperties(dto,employee);
        //补充数据
        //默认密码
        employee.setPassword(DigestUtils.md5Hex(PasswordConstant.DEFAULT_PASSWORD));
        //status状态:
        employee.setStatus(StatusConstant.ENABLE);
//        //createTime和updateTime
//        LocalDateTime now = LocalDateTime.now();
//        employee.setCreateTime(now);
//        employee.setUpdateTime(now);
//        //createUser 和 updateUser；先假写数据
//        Long currentUser = BaseContext.getCurrentId();
//        employee.setCreateUser(currentUser);
//        employee.setUpdateUser(currentUser);
        //使用AOP统一赋值
        employeeMapper.insert(employee);
        return Result.success();
    }
    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    @Override
    public Result updateStatus(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateById(employee);
        return Result.success();
    }

    @Override
    public Result findById(Long id) {
        Employee employee = employeeMapper.findById(id);
        return Result.success(employee);
    }

    @Override
    public Result update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //使用AOP统一赋值
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.updateById(employee);
        return Result.success();
    }

}
